Multiverse with custom main deck?

So - I often enjoy making my own custom main deck (and changing it around from time to time for different play experiences)

When doing the Multiverse mode of play, was it ever tested with a custom main deck?

From reading the rules, it looks like everything should be ok -- it's just some cards may not be in the multiverse, and if ever they get an option that doesn't exist in the multiverse (say I have all my equipment from the Arrow crossover in the main deck and they need to gain an equipment from the Arrow crossover) -- then there's rules that say "pick another random multiverse" ... so shouldn't need to worry about that case.

Just curious if it was ever tested that way or not (even just a couple random games)?